Oil-burner.



R. B. MQLBLLAN.

OIL BURNER.

APPLICATION FILED APR. 3 1911.

Patented'June 25, 1912.

[9 :4. Ma m INVENTOR A TTOR/VEY UNITED STATES. PATENT OFFICE.

ROBERT BURNS MOLELLAN, OF SEATTLE, WASHINGTON.

OIL-BURNER.

Specification of Letters fatent.

Applicatioafiled April 3, 1911.

Patented J une 25, 1912 Serial No. 618,757.

To all whom it mag) concern:

Be it known that I, ROBERT Burns Mo LELLA v, a citizen of the. UnitedStates, residing" at Seattle, in the county of King and State ofWashington, have invented a new and useful, Oil-Burner, of which thefollowing is a'specification.

My invention relates to improvements in that class of oil burnersadapted to burn oil as a fuel in steam-boiler furnaces, cruciblefurnaces, stoves, ranges, house-heating furnaces and the like.

The objects of my invention are, to pro-' .a longitudinal sideview" ofsame and Fig. '3 a cross-sectional view of. same, looking towardthedirection of the arrows from the broken line 3 shown in Fig. 1.

Similar numbers refer to similar parts throughout the several views.

- In oil burners of this class the highest efliciency of the fuel can beattained only when the oil employed is atomized before it reaches thepoint of c mbustion, irrespective of variations in t e rate of oilconsumption. 'Under such conditions a flame of larger volume with higherflame-temperature reaches a longer distance from the.

nozzle or tip of the burner. In burners heretofore employed suchconditions have not been-.readily attained. In such burners a changeinthe rate of flow of the oil would cause the oil to reach the point ofcombustion in a liquid state in theform of s ray or small drops whichmakes a smoky fi ame of comparatively small volume "and lowflame-temperature with consequent decrease in efficiency of fuel. By myinvention all the oil consumed, irrespective of chan s in the rateof'consumption, reaches the pomt of combustion in a finelydivided statemixed wit'hthe pro er proportion of oxygen for producing a ame of largevolume and high flame-temperature whereby results the highestefiiciency.

Referring to the drawings I will now describe-the plan of constructionand mode of operation of my invention.

4, illustrates the body or frame of my burner which preferably is castin one piece of metal.

5 shows a screw cap which embodies a feeding tube 6 and which is adaptedto screw on to the body 4 of the burner so that the tube 6 projects intothebody 4. 7 represents an elastic washer or gasket, of materialsuitable for withstanding heat, disposed between the screw-cap5 and body4. 8 represents a pipe-thread on the outer end of the feeding tube 6which is adapted to connect with a pipe, not shown, leading to somesource of 011 sup ly. Such pipe should, obviousl be prov1ded.with means.

for regulating t erate of oil flow into the burner.

9 and 9 represent inlets adapted to connect with steamipes or air-pipes,not shown,.through which steam or air, or both steam and air may passinto the receiving chamber 10. From the chamber 10 through the centralportion of the body lead a'plur'ality of passages 11 formed likesegments of a circle by reason of the'spoke like Iongitudinal partitions12. These passages .11

lead into an intermediate chamber 13 from which other passages 14 of aform similar to passages 11 lead into another chamber 15, which chamber15 serves as an outlet chamber. The passages 11 and the passages 14 areso disposed circumferentially with respect to each other that thepassages 14 are in a line with the partitions 12 as shown in Fig. 3.From the outlet chamber 15 there leads the threaded outlet 17 which isadapted to receive and connect with a pipe, not shown, suitable to serveas the tip of the burner.

, Theoperation of my invention is as follows: Air or steam is admittedinto the inlet chamber 10 through inlets 9 and 9 by means of pipes, notshown, provided with cocks .or other means for regulating streams of airor steam from the lnlets 9 and 9 with the result that the oil is brokenin fine sprayand then forced through passages 11 into chamber 13 whereit has further time to be atomized, thence the now atomized oil isforced through passages 14 into chamber -whereit is joined by additionalair which is forced in chamber 15 through the sidev passages 16.' Fromthe outlet chamber 15 the atomized oil (thoroughly mixed with air orsteam in proportionsregulated as desired) is forced 'through thethreaded outlet 17 thence to the burner tip, not shown, where its com-.bustion results in high efiiciency, It will be observed that themixedair and oil spray in its progress from chamber 10 to chain-- ber 15comes in contact with large areas of metal which retards or retains suchportion of the oil as stillis in liquid formuntil it becomes atomized.

Having thus described my invention, what I claim is: i

In an oil burner of the class described, a feed pipe for oil, inletsadapted each for connection with an independent source of compressedgaseous fluid, a receiving chamber, an intermediate. chamber, an outletchamber adapted to connect with a burner tip; independent side passagescommunicat-.

seal.

ROBERT BURNS MCLELLAN.

Witnesses: 4

- H. A. MUFFLEY,

Mrs. W. METZENBAUM.

I a i of March, 1911 hereunto set my hand and

